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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Intracellular stimulation of mast cells with guanine nucleotides mimic antigenic stimulation.

Exocytosis was followed in single rat peritoneal mast cells, by measuring the cell membrane capacitance using circuit analysis and patch-clamp techniques. After antigenic stimulation or intracellular perfusion with guanine nucleotides, exocytosis followed a time course characterized by a lag period d, area expansion factor A, and a time constant tau. We suggest that A depends entirely on the cell's morphology, d reflects the properties of a GTP-binding regulatory protein that appears to rate limit the response and tau is due to an independent and yet unknown process. In contrast, cells stimulated by compound 48/80 can respond without a measurable delay and degranulate within 2 s, suggesting that this compound acts at a site after the GTP-binding regulatory protein.[1]

References

  1. Intracellular stimulation of mast cells with guanine nucleotides mimic antigenic stimulation. Fernandez, J.M., Lindau, M., Eckstein, F. FEBS Lett. (1987) [Pubmed]
 
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